private void Button_Click(object sender, RoutedEventArgs e)
{
string root = textBox1.Text;
ModuleUKSN parent = (ModuleUKSN)base.ParentModule;
expandedItems.Clear();
FindExpandedItems(theTreeView.Items, root);
theTreeView.Items.Clear();
List <Thing> KB = parent.GetTheKB();
Thing t = parent.Labeled(root);
if (t != null)
{
TreeViewItem tvi = new TreeViewItem {
Header = t.Label
};
tvi.IsExpanded = true; //always expand the top-level item
theTreeView.Items.Add(tvi);
tvi.MouseRightButtonDown += Tvi_MouseRightButtonDown;
AddChildren(t, tvi, 0);
}
}